body{
    text-align: center;
    margin: 0 auto;
    padding: 0;
}
.clear{
    clear: both;
}
.section{
    margin: 5px auto;
}
.section-content{
    margin: 5px auto;
    text-align: left;
    text-indent: 35px;
    padding: 0 15px;
}
.title{
    margin: 10px auto;
}
.content{
    text-align: center;
}
.space{
    display: inline-block;
    padding: 0 5px;
}
.word{
    font-weight: bold;
}
.word>rt{
    font-weight: normal;
}

ruby {
    line-height: 2.6em;
    padding: 0 0.1em;
    letter-spacing: 0;
}

rt {
    font-size: 70%;
    padding: 0 3px;
}